
RELIALOGIC CORPORATION PRIVATE, LTD.

R486 SX25MBC, R486 DX33MBC, R486 DX50MBC, R486 DX2-50MBC, R486 DX2-66MBC

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          UMC
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         J1       Reset switch                J4

  Speaker                     J2       Turbo LED                   J5

  Turbo switch                J3       External battery            J6

                        USER CONFIGURABLE SETTINGS

                 Function                      Jumper         Position

     Battery type select - internal            W22            Closed

      Battery type select - external            W22             Open

     Monitor type select                       W18             Open
      monochrome/EGA/VGA

      Monitor type select CGA                   W18            Closed

                            DRAM CONFIGURATION

     Size            A             B              C               D

     1MB        (4) 256K x 9      NONE           NONE           NONE

     2MB        (4) 256K x 9  (4) 256K x 9       NONE           NONE

     3MB        (4) 256K x 9  (4) 256K x 9    (1) 256K x        NONE
                                                  36

     4MB        (4) 256K x 9  (4) 256K x 9    (1) 256K x    (1) 256K x 36
                                                  36

     4MB        (4) 1M x 9        NONE           NONE           NONE

     5MB        (4) 256K x 9   (4) 1M x 9        NONE           NONE

     6MB        (4) 256K x 9  (4) 256K x 9   (1) 1M x 36        NONE

     8MB        (4) 1M x 9     (4) 1M x 9        NONE           NONE

     9MB        (4) 256K x 9   (4) 1M x 9    (1) 1M x 36        NONE

     10MB       (4) 256K x 9  (4) 256K x 9   (1) 1M x 36     (1) 1M x 36

     12MB       (4) 1M x 9     (4) 1M x 9    (1) 1M x 36        NONE

     16MB       (4) 1M x 9     (4) 1M x 9    (1) 1M x 36     (4) 1M x 9

     16MB       (4) 4M x 9        NONE           NONE           NONE

     20MB       (4) 1M x 9     (4) 4M x 9        NONE           NONE

     24MB       (4) 1M x 9     (4) 4M x 9    (1) 1M x 36        NONE

     32MB       (4) 4M x 9     (4) 4M x 9        NONE           NONE

     40MB       (4) 4M x 9     (4) 4M x 9    (1) 1M x 36     (1) 1M x 36

                         DRAM JUMPER CONFIGURATION

           Bank                W12        W13         W15         W16

  Bank 0 = A, Bank 1 = B,    pins 1 &   pins 1 &    pins 1 &   pins 1 & 2
  Bank 2 = C, Bank 3 = D        2          2           2

  Bank 0 = C, Bank 1 = D,    pins 2 &   pins 2 &    pins 2 &   pins 2 & 3
  Bank 2 = A, Bank 3 = B        3          3           3

  Note:Pins designated should be in the closed position.

                            CACHE CONFIGURATION

     Size          Bank 0       Bank 1          TAG       U10 (Dirty Bit)

     64KB        (4) 8K x 8   (4) 8K x 8    (1) 8K x 8      (1) 16K x 4

     128KB       (4) 32K x 8     NONE       (1) 8K x 8      (1) 16K x 4

     256KB       (4) 32K x 8  (4) 32K x 8   (1) 32K x 8     (1) 16K x 4

                        CACHE JUMPER CONFIGURATION

   Size    W2    W3     W4     W5      W6        W7        W8       W9

   64KB    1 &   1 &   Open    1 &    Open      Open      Open     Open
            2     2             2

  128KB    2 &   1 &   1 & 2   2 &   Closed     Open      Open    Closed
            3     2             3

  256KB    2 &   2 &   2 & 3   1 &   Closed    Closed    Closed   Closed
            3     3             2

  Note:Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

          Type                      W10                     W11

         80486SX                   Open              pins 2 & 3 closed

         80487SX             pins 2 & 3 closed        pins 1 & 2, 3 & 4
                                                           closed

         80486DX             pins 1 & 2 closed        pins 1 & 2, 3 & 4
                                                           closed

        80486DX2             pins 1 & 2 closed        pins 1 & 2, 3 & 4
                                                           closed

